ffmpeg problem for wmv

[kishanforum]

when iam executing this command through exec its not working where as its working through command line

and this is the problem only for wmv files suggest what can be the problem.

 

                                    $file_ext= strtolower($file_ext_Arr[count($file_ext_Arr)-1]);  

  $fileid = md5(uniqid(time(), 1));                                                

                                            $src = "system/cache/videos/". $fileid.".".$file_ext;

  $dest="system/cache/videos/".$fileid;

 

  // echo "ffmpeg -i $src -ar 22050 -ab 32 -f flv  -acodec mp3 -s 320x240  $dest.flv";

[nethnet]

Show us what is being output as well as the contents of your array.

[kishanforum]

simply say

my source file is 11.wmv and destination is dest.flv

 

when i say

exec(echo "ffmpeg -i 11.wmv  -ar 22050 -ab 32 -f flv  -s 320x240  dest.flv" through php it is creating  afile od 0 size

 

where as when i type the same through command it is creating coorectly what can be the  problem